Do my Exicon MOSFETs look genuine? - diyAudio
Go Back   Home > Forums > Amplifiers > Solid State

Solid State Talk all about solid state amplification.

Please consider donating to help us continue to serve you.

Ads on/off / Custom Title / More PMs / More album space / Advanced printing & mass image saving
Reply
 
Thread Tools Search this Thread
Old 17th August 2015, 09:36 AM   #1
Kev06 is offline Kev06  England
diyAudio Member
 
Join Date: Oct 2006
Location: Derby, UK
Default Do my Exicon MOSFETs look genuine?

I bought some Exicon ECX10P20R/10N20R lateral mosfets back in 2013, and am just coming up to using them (after an unexpected delay). Back then, Profusion was unable to get any stock (I believe the manufacturers had a flood or something and production ceased for a while) so for better or worse I bought them from.... ebay.

I should say that I've no reason whatsoever to suspect that the UK seller (lyn3009 / Electronic Bits and Bobs) or the mosfets are not 100% genuine, the seller has a good record and no suggestion of dishonesty in their feedback, I just have a general distrust of components on ebay. But the manufacturers aren't big on photographs and profusion only have a tiny thumbnail, so I'm finding it hard to check, short of measurement. Is anyone able to tell by looking if these seem okay?

Click the image to open in full size.

Click the image to open in full size.

Thanks
Kev
Attached Images
File Type: jpg my_exicons_1.JPG (183.6 KB, 402 views)
File Type: jpg my exicons_2.JPG (165.9 KB, 396 views)

Last edited by Kev06; 17th August 2015 at 09:49 AM.
  Reply With Quote
Old 17th August 2015, 09:52 AM   #2
diyAudio Member
 
Join Date: Jun 2011
Location: Sydney
Must admit the print looks pretty rough but lateral MOSFETS are not prone to fakes as there pin-out is different to other MOSFETS.
  Reply With Quote
Old 17th August 2015, 10:01 AM   #3
Kev06 is offline Kev06  England
diyAudio Member
 
Join Date: Oct 2006
Location: Derby, UK
Thats slightly encouraging, I didn't think about the pin-outs. Thanks.
Kev
  Reply With Quote
Old 18th August 2015, 07:53 AM   #4
astx is offline astx  Austria
diyAudio Member
 
Join Date: Jan 2011
Location: Tyrol / Austria
yours are looking like fakes ...

Here are Exicons bought from Profusion:
Attached Images
File Type: jpg ecw_20n20z_20p20z.jpg (675.1 KB, 131 views)
  Reply With Quote
Old 18th August 2015, 08:29 AM   #5
Kev06 is offline Kev06  England
diyAudio Member
 
Join Date: Oct 2006
Location: Derby, UK
Thanks for the info, much appreciated.

Yours are a different model of mosfet (and perhaps manufactured more recently), so I guess its hard to be absolutely certain, but I fully agree they look very different <sigh>

Has anyone else bought my model (ECX10P20R/10N20R) a few years ago?

Cheers
Kev
  Reply With Quote
Old 18th August 2015, 08:34 AM   #6
Mooly is offline Mooly  United Kingdom
diyAudio Moderator
 
Mooly's Avatar
 
Join Date: Sep 2007
Quote:
Originally Posted by triplej View Post
Must admit the print looks pretty rough but lateral MOSFETS are not prone to fakes as there pin-out is different to other MOSFETS.
Did you do as triplej suggests ?

Yours look typical of small scale production... I'll bet they are genuine.
__________________
-------------------------------------------------------
Installing and using LTspice. From beginner to advanced.
  Reply With Quote
Old 18th August 2015, 09:21 AM   #7
Kev06 is offline Kev06  England
diyAudio Member
 
Join Date: Oct 2006
Location: Derby, UK
I hope you're right Mooly, I won't give up yet, then. I'll also have to dig my gear out of storage and try to test the pins.

In the mean-time I've done a bit more searching, I can't find a lot but I've run across suggestions that (following some major flooding) the exicon factory may have been reborn anew, so that could explain newer printing methods, as could a larger scale manufacturing run.

I've found several examples that look like mine, but sadly no providence so that isn't helpful. I've also found some newer versions of the same model
Click the image to open in full size.
that look like ASTX's in style. I'd like to think they're 'so' different that an attempted fake would be more similar, but maybe thats being wishful.

I also found some that were different again, so it all seems a bit muddy. E.g. these
Click the image to open in full size.
one pair were even completely blank and unmarked.

Thanks
Kev
Attached Images
File Type: jpg exicon-modern.jpg (22.0 KB, 131 views)
File Type: jpg exicon mart4ic.JPG (15.7 KB, 115 views)

Last edited by Kev06; 18th August 2015 at 09:25 AM.
  Reply With Quote
Old 18th August 2015, 02:24 PM   #8
diyAudio Member
 
dillmeister's Avatar
 
Join Date: Jun 2009
Location: Prince George
Here are some pics of the same mosfets I purchased directly from Exicon before and after the supposed flooding incident you spoke of. These appear to be from before as the ones I purchased after the three lines beside Exicon blend together to form a box on the after units. Looking at the before units it says Thailand in the little circle and Phillipines on the after units.
Attached Images
File Type: jpg EX1.jpg (375.9 KB, 49 views)
File Type: jpg EX2.jpg (896.6 KB, 50 views)
File Type: jpg EX3.jpg (425.3 KB, 46 views)
__________________
I used to be indecisive, but now I'm not so sure.
  Reply With Quote
Old 18th August 2015, 02:42 PM   #9
sangram is offline sangram  India
diyAudio Member
 
Join Date: Sep 2002
Location: India
The ones in the picture marked 'Polida' are Siliconix vertical MOSFETs. Pin length, finish and the package shape near the 'ears' seem to be dead giveaways.

Which these also might be.
  Reply With Quote
Old 18th August 2015, 02:57 PM   #10
Did it Himself
diyAudio Member
 
richie00boy's Avatar
 
Join Date: Nov 2003
Location: Gloucestershire, England, UK
Polida is a known fake seller.

Just get the multimeter out and you'll know for sure. As you bought from a UK seller it is likely they just buy in bulk from Profusion and resell at a profit in low quantity.
__________________
www.readresearch.co.uk my website for UK diy audio people - designs, PCBs, modules and more.
  Reply With Quote

Reply


Hide this!Advertise here!
Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


Similar Threads
Thread Thread Starter Forum Replies Last Post
2sk1058 or Exicon lateral mosfets? rhythmsandy Solid State 16 9th June 2014 06:09 PM
Counterpoint SA-100 with Exicon MOSFETs woodman Solid State 28 23rd March 2014 02:25 PM
Exicon lateral MOSFETs davygrvy Solid State 18 6th December 2011 10:56 AM
How do the pinouts on Exicon mosfets work? reiver Solid State 4 11th October 2008 01:27 AM
exicon mosfets STUART Solid State 8 23rd November 2001 09:30 PM


New To Site? Need Help?

All times are GMT. The time now is 04:43 PM.


vBulletin Optimisation provided by vB Optimise (Pro) - vBulletin Mods & Addons Copyright © 2015 DragonByte Technologies Ltd.
Copyright 1999-2015 diyAudio

Content Relevant URLs by vBSEO 3.3.2